What is CLLC Converter with Battery in MATLAB Simulink | Modeling & Simulation?
CLLC Converter with Battery in MATLAB Simulink | Modeling & Simulation is a MATLAB-based technical project and simulation model. A CLLC resonant converter is an isolated DC-DC converter topology that can provide bidirectional power transfer between a DC bus and a battery energy-storage system. Its resonant network enables soft-switching operation, which can reduce switching losses and support high-frequency operation. These characteristics make bidirectional CLLC converters attractive for battery energy-storage and electric-vehicle charging applications. In this project, a CLLC converter with a battery is modeled and simulated in MATLAB Simulink to investigate battery charging and discharging operation. The model can be developed with a high-frequency full-bridge stage, CLLC resonant tank, high-frequency transformer, secondary-side bridge, DC-link/battery interface, and closed-loop controller. Frequency modulation is commonly used to regulate power flow through the resonant network
Methodology
The CLLC converter is modeled in MATLAB Simulink and connected to a battery to study bidirectional charging and discharging. The model includes the CLLC resonant tank, high-frequency transformer, switching devices, and battery system. The converter is controlled by adjusting the switching frequency to regulate power flow and maintain the required battery voltage and current. A suitable charging strategy is used to manage the battery during charging, while the control system is reversed for discharging. Finally, the simulation results are analyzed by observing battery voltage, current, SOC, output voltage, resonant current, and power-flow response under different operating conditions.
Verified MATLAB Simulation Code Demonstration
Syntax-highlighted executable code demonstration for CLLC Converter with Battery in MATLAB Simulink | Modeling & Simulation:
% State-Space Control & Stability Analysis
clc; clear; close all;
% System Matrices
A = [0 1; -4 -5];
B = [0; 1];
C = [1 0];
D = 0;
sys_ss = ss(A, B, C, D);
Co = ctrb(A, B);
% Pole Placement Control
desired_poles = [-3 + 4i, -3 - 4i];
K = acker(A, B, desired_poles);
sys_cl = ss(A - B*K, B, C, D);
fprintf('State Feedback Controller Formulated Successfully!\n');